#include <iostream>
#include <string>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "err.hpp"

static void usage(std::string proc)
{
    std::cout << "Usage:\n\t" << proc << " prot\n"
              << std::endl;
}

// ./tcp_client serverip serverport
int main(int argc, char *argv[])
{
    if (argc != 3)
    {
        usage(argv[0]);
        exit(USAGE_ERR);
    }
    std::string serverip = argv[1];
    uint16_t serverport = atoi(argv[2]);

    // create sock
    int sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock < 0)
    {
        std::cerr << "create socket error: " << strerror(errno) << std::endl;
        exit(SOCKET_ERR);
    }

    // connect
    struct sockaddr_in server;
    memset(&server, 0, sizeof(server));
    server.sin_family = AF_INET;
    server.sin_port = htons(serverport);
    inet_aton(serverip.c_str(), &server.sin_addr);

    int cnt = 5;
    while (connect(sock, (struct sockaddr *)&server, sizeof(server)) != 0)
    {
        sleep(1);
        std::cout << "正在给你尝试重连，重连次数还有： " << cnt-- << std::endl;
        if (cnt <= 0)
        {
            break;
        }
    }
    if (cnt <= 0)
    {
        std::cerr << "连接失败..." << std::endl;
        exit(CONNECT_ERR);
    }
    // 连接成功
    char buffer[1024];
    while (true)
    {
        std::string line;
        std::cout << "Enter>> ";
        getline(std::cin, line);
        write(sock, line.c_str(), line.size());

        ssize_t s = read(sock, buffer, sizeof(buffer) - 1);
        if (s > 0)
        {
            buffer[s] = '\0';
            std::cout << "server echo>> " << buffer << std::endl;
        }
        else if (s == 0)
        {
            std::cerr << "server quit" << std::endl;
            break;
        }
        else
        {
            std::cerr << "read error: " << strerror(errno) << std::endl;
            break;
        }
    }

    close(sock);
    return 0;
}